I have been using Obagi Nu-derm since October 2016 and satisfied. I want to decrease the frequency of my skin exposure to HQ so can I do some kind of maintenance regimen using certain product on certain days only? Is it safe to include hyaluronic acid serum on my regimen, if so, when (am or pm/after toner?) I also want to include vitamin C in this regimen. Any thoughts is great appreciated. Thanks!
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